Allan stirling



3 Sheets Sheet 1.

(No Model.)

A. STIRLING.

BOILER AND FURNACE.

No. 381,595. Patented Apr. 24, 1888 (aw/naming L2 ZZQT/ ASYZZ'TZZIW.

(No Model.) 3 SheetsSheet 2.

A. STIRLING.

BOILER AND FURNACE.

No. 381,596. Patented Apr. 24, 1888.

JZZZan, 5

3 Sheets-Sheet 3.

(No Model.)

A. STIRLING.

BOILER AND PURNAGBL Patented Apr. 24, 1888.

UNITED STATES PATENT @rrrcn.

ALLAN STIRLING, OF YONKERS, NEW YORK.

BOILER AND FURNACE.

.5ZPTEE(.IIJPICIA'IIOIt? forming part of Letters Patent No. 381,595,dated April as, 1888.

Application filed January 2-1, 1888. Serial No. 251,:73. (N0 model.)

To all whom it may concern.-

Be it known that I, ALLAN STIRLING, a citizen of the United States,residing at Yonkers, in the county of Nestchester and State of New York,have invented a new and useful Improvement in Steam Boilers andFurnaces, of which the following is a specification.

My invention relates to an improvement in steam-boilers and furnacestherefor; and it consists in the peculiar construction and combinationof devices,that will be more fully set forth hereinaftenand particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional view of a steam-boiler and furnace embodying my improvements.Fig. 2 is a vertical transverse sectional view of the same, taken on theline 3/ y of Fig. 1. Fig. 3 is a similar view, taken on the line a a ofFig. 1. Fig. 4 is an enlarged detail view of a portion of the boiler.Fig. 5 is a similar view showing the means for securing the manholeplate to the boiler. Fig. 6 is a similar view showing the means forsecuring the stcainpipe to the boiler.

Arepresents the furnace or setting, which is built of masonry, and is ofthe form here shown. In one end of the furnace or setting is a fire-box,13, having a door, 0, for the admission of fuel. The bottom of thefire-box is formed by a downwardly and rearwardly inclined grate, D, therear end of which is supported by a transverse wall, E, which forms therear side of the ash-pit F and of the firebox.

G represents a transverse plate, which extends upward and forward fromthe wall E,and is arranged at an angle, as shown in Fig. 1. From theupper side of this plate or partition G projects a forward and upwardlyinclined arch. H, which is arranged over the major portion of thefire-box. Extending rearward from the said arch is a plate or partition,I, which is arranged at a slight inclination, as shown, and has its rearside turned upward to form the flange-plate K.

The upper portion or roof of that portion of the furnace which isarranged over the firebox is inclined upward and rearward, as shown inFig. 1, and is arched concentrically with the arch H, as shown in Fig.3, and is provided on its under side with a series of as cendingshoulders or steps, L.

M represents the body of the boiler, consisting of plates at rivetedtogether, as shown, and the said body of the boiler is supported in theupper portion of the furnace or setting at such an angle that thewaterin the front portion of the boiler is deepest where it is exposedto the greatest degree of heat. The upper and lower sides of the boilerare connected by a series of bolt or brace rods, b, which have theirlower ends screwed into the lower side of the boiler, and their upperends provided with screwthreads and extending through openings in theupper side of the boiler, as shown. Nuts a are screwed onto the saidupper portions of the bolt or brace rods, and bear against the upper andlower sides of the top of the boiler, so as to secure the same fromexpansion under pressure. On the top of the boiler is the usual1nan-hole,which is covered by a plate, d, and a steamescape pipe, e,having a flange, f, at its base. The upper ends of some of the brace orbolt rods 2) pass also through the manhole plate and through the flangeof the steampipe, so as to secure the same firmly in posi' tion ontheboiler, as shown in detail at Fig. 4..

N 0 represent tyvo series -of water-tubes, which depend from the lowerside of the boiler and are arranged at right angles thereto. The lowerends of the said water-tubes are closed, and the upper ends thereof-areopen and communicate with the boiler. The series of tubes Nare shorterthan the tubes 0, and thelower ends of said tubes N are almostin contactwith the upper side of the plate I.

P represents a partition-plate, which extends downward from the bottomof the boiler at a suitable distance in rear of the flange-plate K,thelow'er end of said plate]? extending to within a suitable distance ofthe lower ends of watertubes 0. The said plate or partition 1?, togetherwith the plates K i G, arch-H, and steps L, are made of anysuitablerefractory material which will withstand the action of intense heat.

At the rear upper corner of the furnace or setting is the escape-flue orchimney It.

S represents awater-supply pipe which cornmunieates with the body of theboiler.

T represents a mud-drnrn,which is cylindrical in shape, is arrangedtransversely on the rear side of the wall E, and is connected to thebody of the boiler by means of pipesU. A blow-off pipe, V, extends fromthe said muddrum and is provided with a stop-cock,W.

The operation of my invention is as follows: The heat and products ofcombustion are deflected forward from the fire-box by the plate orpartition G and the arch H, and pass upward and rearward under the stepsL, around the tubes N and O, are then deflected downward by thepartition I, and pass upward in rear of said partition to the flue orchimney R, from which they escape. The partitionplates and arch H, byintercepting the caloriccurrents, utilize the heat to the highestdegree. The steps L form heating-surfaces, which become intensely heatedby the fire,and the gases generated by combustion come in contact withthe said steps and are caused to burn and give out additional heat, andare thereby prevented from escaping idly from the furnace, andconsequently the fuel is entirely utilized.

The peculiar construction of the boiler, hereinbefore described,provides the same with a maximum amount of heating-surface. Thewater-tubes increase theheating surface of the boiler and maintain aconstant circulation of water, and by inclining the boiler, as shown anddescribed, the water therein is deepest at the point where the boiler isexposed to the most intense heat, and a large space is formed at therear upper side of the boiler for steam, thus obviating the necessity ofemploying a steam dome in order to obtain dry steam. The drum T receivesthe sediment deposited by the water in the boiler, and when a quantityof mud or sediment collects in the drum the same may be blown out byopening the valve or stop cock'W in the blow-oft pipe V.

Having thus described my invention, I claim-- 1. The setting,the boilersupported thereon, the fire-box in the front of the setting and havingthe arch H over its rear portion, and the rearward and upward inclinedseries of steps L, extending from over the front portion of the fire-boxto the boiler, substantially as described.

2. The combination of the boiler having the depending water-tubes andthe furnace or setting in which the boiler is located, provided with thefire-box having the arch H, and the partitions I P, to direct thecaloric currents between the water-tubes, substantially as described.

3. The steam boiler having the man-hole plate and the steam'pipesprovided with the fiangef, and the brace or bolt rods connecting thesides of the boiler and extending through the man-hole plate and theflange f, substantially as described.

4. The combination of the inclined boiler, the setting supporting thesame, and having the rearward and upward inclined series of steps L,extending to the lower portion of the boiler, and the fire-box arrangedunder the series of steps L, whereby the latter dlrect the most intenseheat to that portion of the boiler where the water is deepest,substantially as described.

5. A steamboiler furnace having the firebox provided with the grate D,the waltE, supporting one end of the grate and forming the rear side ofthe fire-box, the forwardly-inclined and upwardly-extending plate orpartition G, rising from the wall,and tneforward and upwardly inclinedarch H, extending from the partition or plate and arranged over themajor portion of the firebox, as set forth.

6. A steam-boiler furnace having the firebox provided with the grate D,the walhE, supporting one end of the grate and form ng the rear side ofthe fire-box, the fOI'WflI'd-ltlclined and upwardly-extending plate orpart1- tion G, rising from the wall, and the forward and upwardlyinclined arch H, extendin g from the partition or plate and arrangedover the major portion of the fire-box, and the plate or partition I,extending rea-rwardly from the arch H, as set forth.

7. A steam-boiler furnace having the fire-v box provided with the grateD,- the wall E, supporting one end of the grate and forming the rearside of the fire-box, the forward-1nclined and upwardly-extending plateor partition G, rising from the wall, and the forward and upwardlyinclined arch H, extending from the partitionor plate and arranged overthe major portion of the fire-box, the upper portion or roof of thefurnace over the fire-box being inclined upward and provided on theunder side with the ascending shoulders or steps L, as set forth.

8. A steam-boiler furnace having the firebox provided with the grate D,the wall E, supporting one end of the grate and forming the rear side ofthe fire-box, the forward-inclined and upwardly-extending plate orpartition G, rising from the wall, and the forward and upwardlyinclinedarch H, extending from the partition or plate and arranged over themajor portion of the fire-box, the plate or partition I, extendingrearwardly from the arch H, the upper portion or roof of the furnaceabove the fire-box beinginclined both upward and rearward and providedon the under side with ascending shoulders or steps, as set forth. 9. Incombination with the furnace having the arch H over the fire-box, theroof over the fire-box being arched concentrically with the arch H, andprovided with the steps L, as set forth.

10. The combination of the boiler having the depending long tubes 0 atits rear portion, and the depending shorter tubes,N, at its frontportion,with the furnacesupportingthe boiler, and having the firebox atits front end and the partition I,extending rearward therefrom under theshort tubes N, and the depending partition P, arranged among the tubes0, substantially as described.

11. The steam-boiler having the man-hole plate, and the steam-pipeprovided with the flange f, and the bolt rods b, having one end screwedto one side of the boiler and projecting through the opposite sidethereof and through the flange of the steam-pipe, and the man-holeplate, the said projecting ends of the bolts having the nuts a,substantially as de scribed.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in pres- 1o ence of two witnesses.

ALLAN STIRLING.

Witnesses: i

JOHN FRASER ToRRANoE, M. 13., OH. THos. GHARBONNEAU.

